Browsing by Author "Fruchter, Andrew S."

Now showing items 1-4 of 4

    • HI column densities of z > 2 Swift gamma-ray bursts 
      Jakobsson, Páll; Fynbo, Johan P. U.; Ledoux, C.; Vreeswijk, Paul M.; Kann, D. A.; Hjorth, Jens; Priddey, R. S.; Tanvir, N. R.; Reichart, Daniel E.; Gorosabel, Jorge; Klose, Sylvio; Watson, Darach; Sollerman, J.; Fruchter, Andrew S.; Ugarte Postigo, A. de; Wiersema, K.; Bjornsson, G.; Chapman, R.; Thone, C. C.; Pedersen, K.; Jensen, Brian L. (EDP SCIENCES S A, 2006-12)
      Context. Before the launch of the Swift satellite, the majority of the gamma-ray burst (GRB) afterglows for which Lya was redshifted into the observable spectrum showed evidence for a damped Lya absorber. This small sample ...
    • No supernovae associated with two long-duration gamma-ray bursts 
      Fynbo, Johan P. U.; Watson, Darach; Thöne, Christina C.; Sollerman, Jesper; Bloom, Joshua S.; Davis, Tamara M.; Hjorth, Jens; Jakobsson, Páll; Jørgensen, Uffe G.; Graham, John F.; Fruchter, Andrew S.; Bersier, David; Kewley, Lisa; Cassan, Arnaud; Castro Cerón, José María; Foley, Suzanne; Gorosabel, Javier; Hinse, Tobias C.; Horne, Keith D.; Jensen, Brian L.; Klose, Sylvio; Kocevski, Daniel; Marquette, Jean-Baptiste; Perley, Daniel; Ramírez Ruiz, Enrico; Stritzinger, Maximilian D.; Vreeswijk, Paul M.; Wijers, Ralph A. M.; Woller, Kristian G.; Xu, Dong; Zub, Marta (NATURE PUBLISHING GROUP, 2006-12-21)
      It is now accepted that long-duration gamma-ray bursts (GRBs) are produced during the collapse of a massive star(1,2). The standard 'collapsar' model(3) predicts that a broad-lined and luminous type Ic core-collapse supernova ...
    • An optical supernova associated with the X-ray flash XRF 060218 
      Pian, E.; Mazzali, Paolo; Masetti, N.; Ferrero, P.; Klose, Sylvio; Palazzi, E.; Ramírez Ruiz, Enrico; Woosley, S. E.; Kouveliotou, C.; Deng, J.; Filippenko, Alexei V.; Foley, Ryan J.; Fynbo, Johan P. U.; Kann, D. A.; Li, Weidong; Hjorth, Jens; Nomoto, K.; Patat, F.; Sauer, D. N.; Sollerman, J.; Vreeswijk, Paul M.; Guenther, E. W.; Levan, A. J.; O'Brien, Peter; Tanvir, N. R.; Wijers, Ralph A. M.; Dumas, C.; Hainaut, O.; Wong, D. S.; Baade, D.; Wang, L.; Amati, L.; Cappellaro, E.; Castro Tirado, A. J.; Ellison, S.; Frontera, F.; Fruchter, Andrew S.; Greiner, J.; Kawabata, K.; Ledoux, C.; Maeda, K.; Møller, P.; Nicastro, L.; Rol, E.; Starling, R. (NATURE PUBLISHING GROUP, 2006-08-31)
      Long-duration gamma-ray bursts (GRBs) are associated with type Ic supernovae(1) that are more luminous than average(2-5) and that eject material at very high velocities. Less-luminous supernovae were not hitherto known to ...
    • Rapid-response mode VLT/UVES spectroscopy of GRB060418 - Conclusive evidence for UV pumping from the time ... 
      Vreeswijk, Paul M.; Ledoux, C.; Smette, A.; Ellison, S.; Jaunsen, A. O.; Andersen, M. I.; Fruchter, Andrew S.; Fynbo, Johan P. U.; Hjorth, Jens; Kaufer, A.; Moller, P.; Petitjean, P.; Savaglio, S.; Wijers, Ralph A. M. (2007)
      We present high-resolution spectroscopic observations of GRB 060418, obtained with VLT/UVES. These observations were triggered using the VLT Rapid-Response Mode (RRM), which allows for automated observations of transient ...